Upgrade Dropbox with encryption

I used owncloud with external storage via Dropbox, files encrypted. As Dropbox changed its API, the old external storages no longer work. Is there any way that I can upgrade them to the new external storage app (described here: https://owncloud.org/blog/external-storage-dropbox/).

I can of course add a new folder and copy files, or I could point the new folder to the same dropbox app. However, as files are encrypted, I can then no longer read them. Is there any kind of upgrade mechanism?


Sorry, there is no upgrade/migration path as this is a completely new implementation. Reason for it being that Dropbox deprecated the formerly available API. Maybe somebody has a great idea how this can still be achieved